1 stick butter
1 medium onion, minced
1/2 cup all purpose flour
4 cups hot milk
1 teaspoon salt
1/4 teaspoon red pepper
dash of nutmeg
4 egg yolks, slightly beaten
1 cup heavy cream
1 cup grated Parmesan cheese
8 slices quality white bread with crusted trimmed off, toasted
1 turkey breast, roasted and sliced
extra Parmesan cheese for sprinkling
8 slices of quality bacon, cooked thoroughly but not quite crisp
Melt the butter in a large saucepan, add the onions and saute until opaque. Stir in the flour and blend using a wire whisk. Slowly add the hot milk and continue to whisk until blended and smooth. Continue to simmer and stir the sauce until the sauce thickens...about 20 minutes. Stir in the salt, pepper and nutmeg and cool.
While the sauce is cooling blend the egg yolks and cream. Add a little of the cooled sauce to the egg mixture and blend. Then add the egg mixture to the rest of the sauce and stir to blend. Add the Parmesan cheese and stir again. This can be made the day before or the morning of and refrigerated.
To assemble the sandwiches, place one slice of toast in the center of an oven proof serving dish. Top with turkey slices to cover. Cover completely with the sauce and sprinkle some of the remaining Parmesan cheese over the sauce. Repeat this process with three additional plates.
Broil all three in a 400 degree oven until bubbly, golden brown. Cut a second slice of toasted bread and place diagonally on each plate. Crisscross two slices of warmed bacon over each dish.